On 15.05.19 14:18, Wall, Stephen wrote:
New CPU microcode may be available in a BIOS update from your system vendor,
or by installing the devcpu-data package or sysutils/devcpu-data port.
Ensure that the BIOS update or devcpu-data package is dated after 2014-05-14.

If using the package or port the microcode update can be applied at boot time
by adding the following lines to the system's /boot/loader.conf:

cpu_microcode_load="YES"
cpu_microcode_name="/boot/firmware/intel-ucode.bin"
Is this applicable in a virtualized environment, or only on bare metal?
If not applicable in a VM, is it at least harmless?
Afaik you can't modify the microcode inside a VM, but give them time. I'm sure Intel optimized that security check away as well in some corner case yet to be discovered.
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